NethServer release 7.4.1708 (Final)
I'm having some issues sending e-mail to some domains (hotmail, yahoo..).
Any time my customer try to send e-mails to those domains the message never reach the destnation inbox.
This happens just with some sender e-mail boxes, it works great with others
Oct 27 11:44:30 mail postfix/smtp: EF5EDA001A1: email@example.com, relay=out.alice.it[18.104.22.168]:25, delay=0.22, delays=0/0.01/0.17/0.04, d
sn=4.0.0, status=deferred (host out.alice.it[22.214.171.124] said: 451 firstname.lastname@example.org unable to verify address (in reply to MAIL FROM command)
I already pushed my customer to subscribe a service like sendinblue.com so to have a reliable smtp,and not to use the Telecom one anymore which, IMHO, is the real problem.
Anyway I just would like to have some feedback.
Have you ever had this kind of problem?
Can be related to some misconfiguration/bug on Nethserver side?
Or, as I believe, the problem is the Telecom Italia smtp.